| The technology of pipe drip irrigation has many advantages,such as saving land,reducing water loss,adapting to more geological and topographical conditions,and facilitating tillage and expanding irrigated area.It can solve the problem of irrigation effectively.It is the trend of future irrigation.However,the high investment of drip irrigation system has become the most important factor restricting the large-scale popularization of drip irrigation.Studying on the arrangement of drip irrigation pipe network and using intelligent algorithms to find the optimal pipe diameter and layout can reduce excessive reliance on the designer's experience,reduce project investment,and facilitate the application of drip irrigation pipe irrigation method to dryland irrigation production practice.Improve the utilization rate of irrigation water and promote the development of agricultural production.In this paper,three different types of drip irrigation pipes are arranged in the "comb" sub-type arrangement,"Feng" type arrangement and "?" type arrangement in the main pipelines,and the wheel irrigation units are divided in consideration of the irrigation sequence influence.The firefly algorithm is used as optimization tool to establish the optimization model.Taking 1300 mu upland from 8551 Farm of Heilongjiang province as an example,the main research contents and conclusions are as follows:(1)In accordance with the principle of the division of the irrigation group,consider the multiple rural households benefiting from a balanced water use.Divide the irrigation group for the drip irrigation network project under each layout scheme to ensure that the same land is irrigated in the same order in each layout scheme.To eliminate the impact on the growth and development caused by the difference in crop irrigation sequence,and to optimize the evaluation of the interference program.(2)Taking the least investment in optimization project as objective function,working pressure and flow velocity in pipelines as the main constraints,an optimization model of drip irrigation pipe network in upland area was established and combined with Firefly Algorithm(FA).The survey data fit the price fluctuation curves of pressure power and investment in the study area as a basis for investment value of pumps and power distribution devices participating in the program.Taking the irrigating unit as the unit,the optimized pipe diameter and the pump pressurizing device were combined to obtain the lowest investment operation plan.The optimal combination of results was analyzed and optimized to obtain the optimal plan in the same arrangement form.Considering all the plans involved in the comparison The investment contains all the factors finally obtains the drip irrigation pipe network project optimal arrangement pattern.(3)Visual Studio 2012 is used as a platform to develop drip irrigation optimization design software for upland fields,using matlab and C ++ computer languages and to optimize the design of drip irrigation pipe network system in engineering practice.(4)The results shows that the investment in drip irrigation system with "Feng" character of backbone pipe was the lowest,which was 820.69 yuan per mu after the firefly algorithm optimization model optimization and comprehensive subsidiary investment.Compared with the "comb" sub-type arrangement and the "?" type arrangement,saved 1.45% and 10.48% respectively,which has a significant saving effect in large-area drip irrigation projects.Visual Studio 2012 as a platform,the use of matlab and C + + computer language,developed for drip irrigation optimization design,software interface looks well,easy to operate,it was verified by the project examples,it runs well,has good effect tand value on the drip irrigation pipe network optimization practice. |
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